> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ziplime.limex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# From Zipline & Quantopian

> The closest possible migration path

If your strategy already runs on **Zipline** or was originally written for **Quantopian**, you're migrating to the platform Ziplime's own engine descends from. This is the most direct migration path available.

Existing Zipline-style strategy code can usually be brought in with minimal changes — the main adjustments come from Ziplime's additions on top of stock Zipline: async execution, the unified backtest/live logic, and access to fundamental and alternative data. See [Engine Overview](/language/introduction/engine-overview) for what's been added.

<Note>
  Quantopian itself has been shut down for some time; if you're migrating old Quantopian research, expect to update deprecated API calls as part of the move.
</Note>